Cita APA (7a ed.)

Bless, R., Korf, D. J., & Freeman, M. (1995). Open drug scenes: A cross-national comparison of concepts and urban strategies. European addiction research, 1(3), 128-138.

Cita Chicago Style (17a ed.)

Bless, Ruud, Dirk J. Korf, y M. Freeman. "Open Drug Scenes: A Cross-national Comparison of Concepts and Urban Strategies." European Addiction Research 1, no. 3 (1995): 128-138.

Cita MLA (8a ed.)

Bless, Ruud, et al. "Open Drug Scenes: A Cross-national Comparison of Concepts and Urban Strategies." European Addiction Research, vol. 1, no. 3, 1995, pp. 128-138.